EP0486759B1 - Procédé et dispositif de traitement ultérieur et purification des gaz d'échappement formés dans une fonderie d'aluminium secondaire - Google Patents

Procédé et dispositif de traitement ultérieur et purification des gaz d'échappement formés dans une fonderie d'aluminium secondaire Download PDF

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Publication number
EP0486759B1
EP0486759B1 EP91110166A EP91110166A EP0486759B1 EP 0486759 B1 EP0486759 B1 EP 0486759B1 EP 91110166 A EP91110166 A EP 91110166A EP 91110166 A EP91110166 A EP 91110166A EP 0486759 B1 EP0486759 B1 EP 0486759B1
Authority
EP
European Patent Office
Prior art keywords
furnace
waste gases
waste
subsequently
rotary drum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91110166A
Other languages
German (de)
English (en)
Other versions
EP0486759A1 (fr
Inventor
Hermann Wilhelm Dr. Dipl.-Ing. Sommer
Robert Dipl.-Ing. Schloderer
Franz P. Dipl.-Ing. Neubacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ERE EMMER RECYCLING UND ENTSORGUNG GMBH
Original Assignee
ERE Emmer Recycling und Entsorgung GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ERE Emmer Recycling und Entsorgung GmbH filed Critical ERE Emmer Recycling und Entsorgung GmbH
Priority to AT91110166T priority Critical patent/ATE102328T1/de
Publication of EP0486759A1 publication Critical patent/EP0486759A1/fr
Application granted granted Critical
Publication of EP0486759B1 publication Critical patent/EP0486759B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/006—Layout of treatment plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/40—Sorption with wet devices, e.g. scrubbers

Definitions

  • Secondary aluminum smelters are used for the preparation and melting of aluminum scrap, keeping it warm, metallurgical treatment and refining of melts, as well as casting into blocks or removal in liquid form.
  • scrap e.g. bare and varnished tin scrap, foils, new and old cast scrap, dross, grooves and chips melted down.
  • a conventional secondary aluminum smelter works according to the following procedure:
  • the scrap is pre-sorted and processed. With regard to their foreign components and alloy components, uniform scrap is melted down directly. Chips are thermally cleaned and dried in a chip processing plant. Aluminum dross is mechanically processed in grinding and screening plants.
  • the prepared scrap is melted in batches in rotating rotary drum furnaces under a salt melt, which absorbs impurities and is renewed if necessary.
  • the melting salt from natural sources consists mainly of a mixture of table salt (NaCl, KCl) and an admixture of approx. 2% CaF2. Approx. 300 to 400 kg of molten salt are required to remelt 1 to metal alloys.
  • the contaminated salt melts are poured into open trays as salt slags, after solidification into compact masses temporarily stored until they are transported to the salt slag reprocessing plant.
  • the metal melts from the rotary drum furnaces are transferred to holding furnaces (converters), in which metallurgical treatment, post-cleaning (refining) and alloying are carried out.
  • Refining is carried out by introducing refining gases (chlorine, nitrogen, argon).
  • refining gases chlorine, nitrogen, argon
  • the substances deposited during this treatment float and are removed as scabies.
  • This scabies is processed and melted back.
  • the processed melts are then either cast into blocks or transferred into insulating containers for liquid transport to foundries.
  • the exhaust gases from the drum furnaces and the holding furnace are fed to a fox system (exhaust duct).
  • the raw gases are fed to the heat exchanger via sheet steel pipes.
  • the final separation of dust takes place in the following flat tube filters.
  • the dust is transported to a central dust discharge point.
  • the cleaned exhaust air flows into the atmosphere via the downstream exhaust fan and chimney.
  • the clean gas values correspond to TA-Luft 1986.
  • DE-A-3 920 519 has disclosed a method and a device for cleaning metal parts, the exhaust gases resulting from the treatment of the metals being completely combusted in a post-combustion system and discharged through a chimney.
  • the invention is based on the object of specifying a method and a device with which the exhaust gases produced during the melting and treatment of aluminum scrap in a secondary smelting plant can be effectively cleaned and freed from pollutants.
  • the main advantage of the method and the device for its implementation is that the exhaust gases, which are practically completely free of harmful substances, meet the strictest legal regulations in a technically simple, very effective manner, and at the same time they also serve to generate steam and burn residues.
  • the scrap processing and melting of the processed aluminum scrap takes place according to the conventional method.
  • the main thing is to record the individual exhaust gas flows and their thermal afterburning and to generate the necessary energy for this from residues.
  • the exhaust gas flows of a rotary drum furnace 1, a converter 3 and a chip drying system 2 are recorded separately.
  • the exhaust gas streams from the rotary drum furnace 1 with approximately 800 to 900 ° C. and the chip drying system 2 with approximately 400 to 500 ° C. are brought together in a mixing chamber 4 and fed to a boiler house 6 via a coarse separator 5.
  • the hot exhaust gas flow is cooled down from approx. 600 ° C. to approx. 150 ° C., and steam is generated in the process.
  • the exhaust gas flow is compressed by means of a downstream suction fan 7 and fed to a combustion furnace 8, such as a fluidized bed furnace, as the carrier gas.
  • a combustion furnace 8 such as a fluidized bed furnace
  • the exhaust gas from the secondary aluminum smelting plant is completely afterburned at temperatures above 800 ° C.
  • residual materials with a high calorific value such as shredder light fractions from automobile recycling, reject material from waste paper recycling or plastic-containing residues from waste treatment, are used in incinerator 8 and completely burned at temperatures above 800 ° C.
  • a cleaning system 9 consisting of a dust filter and gas scrubber is used and activated carbon filter used.
  • the exhaust gas flows from the converter 3 are fed directly to the gas scrubber by means of a suction fan.
  • the cleaned exhaust gases are discharged via a chimney 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)
  • Incineration Of Waste (AREA)

Claims (5)

  1. Procédé pour le retraitement et l'épuration de gaz d'échappement produits dans une installation de fusion secondaire d'aluminium lors de la fusion, du traitement métallurgique, de l'épuration et de l'apport en alliage de ferrailles d'aluminium préparées, gaz que l'on brûle et que l'on dirige sur une cheminée,
       caractérisé en ce que
    les divers courants de gaz d'échappement provenant d'un étage de fusion dont les gaz d'échappement sortent avec une température d'environ 800 à 900°C et d'une étage de séchage dont les gaz d'échappement sortent avec une température d'environ 400 à 500°C sont mélangés et dirigés sur un -séparateur grossier d'un étage de refroidissement dans lequel ils sont refroidis d'environ 600°C à environ 150°C et la vapeur produite alors est extraite et réutilisée, et en ce que les gaz d'échappement refroidis sont comprimés et totalement brûlés à des températures supérieures à 800°C comme gaz porteur avec des matières résiduelles additionnelles à pouvoir calorifique élevé.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on emploie comme matières résiduelles des fractions légères de shredder de récupération automobile, des matières de rejet de récupération de vieux papiers ou des reliquats de retraitement de déchets.
  3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, dans lequel on prévoit un four à tambour rotatif (1) pour la fusion des ferrailles préparées sous une masse fondue de sel, et soumet la masse fondue de métal provenant du four à tambour rotatif à un traitement métallurgique, une épuration et un apport en alliage dans un four à conservation de chaleur (3) (convertisseur),
       caractérisé en ce qu'
    un séchoir à copeaux (2) et le four à tambour rotatif (1) sont reliés à une chambre de mélange (4) dans laquelle les gaz d'échappement quittant le séchoir à copeaux (2) et le four à tambour rotatif (1) sont mélangés et peuvent être amenés à un caisson (6) par l'intermédiaire d'un séparateur grossier (5), en ce qu'il est prévu, entre le caisson (6) et le four de brûlage (8) qui est lui-même pourvu d'un dispositif pour charger des matières résiduelles à pouvoir calorifique élevé, une soufflerie de canal d'aspiration (7), et en ce qu'est adjoint au four de brûlage (8) un dispositif d'épuration (9) qui reçoit également le gaz d'échappement provenant du four à conservation de chaleur (3).
  4. Dispositif selon la revendication 3, caractérisé en ce que le four de brûlage est un four à couches tourbillonnaires.
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif d'épuration (9) comporte un filtre à poussières, un laveur de gaz et un filtre à charbon actif.
EP91110166A 1990-11-23 1991-06-20 Procédé et dispositif de traitement ultérieur et purification des gaz d'échappement formés dans une fonderie d'aluminium secondaire Expired - Lifetime EP0486759B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91110166T ATE102328T1 (de) 1990-11-23 1991-06-20 Verfahren und vorrichtung zum weiterbehandeln und reinigen von in einem sekundaer-aluminiumschmelzwerk entstehenden abgasen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4037370 1990-11-23
DE4037370A DE4037370A1 (de) 1990-11-23 1990-11-23 Verfahren und vorrichtung zum weiterbehandeln und reinigen von in einem sekundaer-aluminium-schmelzwerk entstehenden abgasen

Publications (2)

Publication Number Publication Date
EP0486759A1 EP0486759A1 (fr) 1992-05-27
EP0486759B1 true EP0486759B1 (fr) 1994-03-02

Family

ID=6418829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110166A Expired - Lifetime EP0486759B1 (fr) 1990-11-23 1991-06-20 Procédé et dispositif de traitement ultérieur et purification des gaz d'échappement formés dans une fonderie d'aluminium secondaire

Country Status (7)

Country Link
US (1) US5224984A (fr)
EP (1) EP0486759B1 (fr)
JP (1) JPH04232217A (fr)
KR (1) KR920009447A (fr)
AT (1) ATE102328T1 (fr)
DE (1) DE4037370A1 (fr)
PT (1) PT98316A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305774C2 (de) * 1993-02-25 1994-11-17 Siempelkamp Gmbh & Co Verfahren zur Rückgewinnung von Metall aus Stahlblechschrott
DE59309437D1 (de) * 1993-11-10 1999-04-15 Rheinfelden Aluminium Gmbh Verfahren und Vorrichtung zur umweltgerechten Rückgewinnung von Aluminium aus Abfällen
DE59407279D1 (de) * 1994-02-07 1998-12-17 Rheinfelden Aluminium Gmbh Verfahren und Vorrichtung zur umweltgerechten Rückgewinnung von Aluminium aus Abfällen
AT400007B (de) * 1994-04-06 1995-09-25 Austria Metall Verfahren zur reinigung von ofenabgasen und zur nutzung des dabei anfallenden filterstaubes
DE19621238A1 (de) * 1996-05-25 1997-11-27 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Reinigung von aluminiumstaubhaltiger Abluft
CN111389124A (zh) * 2019-05-16 2020-07-10 佛山市航亚铝业有限公司 一种铝材熔铸真空精炼除气装置
CN114534461A (zh) * 2022-01-13 2022-05-27 淮北矿业股份有限公司 一种利用余热升温的脱硫脱硝反应器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2005220A1 (en) * 1970-02-05 1971-08-19 Weissheimer V Metallurgical furnace flue gas removal plant
US4019896A (en) * 1972-10-25 1977-04-26 Appleby Vernon L Trash disposal system
US4010935A (en) * 1975-12-22 1977-03-08 Alumax Inc. High efficiency aluminum scrap melter and process therefor
JPS5582735A (en) * 1978-12-18 1980-06-21 Daiei Tsushin Shisetsu Kk Recovering and recycling method for industrial waste aluminum-plastic scrap
DE3443452A1 (de) * 1984-11-29 1986-05-28 Varta Batterie Ag, 3000 Hannover Schachtofen zur verhuettung von altblei aus akkumulatorenschrott mit einer nachverbrennungsanlage fuer das beim verhuettungsprozess entstehende gichtgas
US4601750A (en) * 1985-06-28 1986-07-22 Aluminum Company Of America Scrap melting system
SU1497437A1 (ru) * 1987-08-31 1989-07-30 Ленинградское Отделение Всесоюзного Научно-Исследовательского И Проектного Института "Теплопроект" Устройство дл тепловой обработки замасленной стружки
DE3920519A1 (de) * 1989-01-24 1990-07-26 Erich Kraemer Verfahren und vorrichtung zum reinigen von metallteilen

Also Published As

Publication number Publication date
ATE102328T1 (de) 1994-03-15
US5224984A (en) 1993-07-06
KR920009447A (ko) 1992-06-25
JPH04232217A (ja) 1992-08-20
DE4037370A1 (de) 1992-05-27
PT98316A (pt) 1992-05-29
EP0486759A1 (fr) 1992-05-27

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